def _validate_block(self, bigchain):
"""Validate the Block without validating the transactions.
Args:
bigchain (:class:`~bigchaindb.Bigchain`): An instantiated Bigchain
object.
Raises:
ValidationError: If there is a problem with the block
"""
# Check if the block was created by a federation node
if self.node_pubkey not in bigchain.federation:
raise SybilError('Only federation nodes can create blocks')
# Check that the signature is valid
if not self.is_signature_valid():
raise InvalidSignature('Invalid block signature')
def _validate_block(self, bigchain):
"""Validate the Block without validating the transactions.
Args:
bigchain (:class:`~bigchaindb.Bigchain`): An instantiated Bigchain
object.
Raises:
ValidationError: If there is a problem with the block
"""
# Check if the block was created by a federation node
if self.node_pubkey not in bigchain.federation:
raise SybilError('Only federation nodes can create blocks')
# Check that the signature is valid
if not self.is_signature_valid():
raise InvalidSignature('Invalid block signature')
# Check that the block contains no duplicated transactions
txids = [tx.id for tx in self.transactions]
if len(txids) != len(set(txids)):
raise DuplicateTransaction('Block has duplicate transaction')